[hibernate-dev] Change in DB lock acquisition in ORM?

Hi, I am investigating the failures in hibernate-infinispan testsuite and I've found that [1] is failing as this uses two threads that both do 1. load entity 2. delete entity 3. flush session 4. commit tx on the same entity. There is a synchronization blocking the commit until both threads flush, and since the first thread holds a H2 DB lock on the entity, the other thread is blocked doing the flush on this lock. It makes sense to me, but I wonder why did the test work in the past. Was there a change in some locking defaults (optimistic/pessimistic) or was there anything delegating the lock acquisition to the commit instead of flush? The test works on 5.0.10. Radim [1] https://github.com/hibernate/hibernate-orm/blob/master/hibernate-infinisp... -- Radim Vansa <rvansa(a)redhat.com&gt; JBoss Performance Team